tileset.json lat/lng

[yiyanggis]

Hi, I'm able to convert obj to 3dtiles. but not sure how to setup the bounding and geometricError in tileset.json. Should I get it from the .obj or what is the way to setup tilesetoptions. Thanks

[PrincessGod]

Hi, Yang. @yiyanggis

You can set these parameters in customTilesetOptions.json file, and here is the full optional parameters list.

And the bounding is parameters minHeight, maxHeight, tileWidth, tileHeight, these value are calculate based on your model file, so basically no need to add. The geometricError is geometricError, default value is 200.

Hope that can make some help, BW.

[CrashedBboy]

Hi @PrincessGod

I'm curious about how vertices' coordinate of OBJ is translated to WGS84 lat / long?
For Example, I have set the location of origin(0, 0, 0) to (24.808927, 121.033922) in customTilesetOptions.json, how does it calculate the latitude and longitude of point (1, 1, 1)?

In addition, I have a model with 9 levels of mesh density: 1 model for level one,2 split models for level two, 4 split models for level three, ...

How would you recommend me to calculate and set the geometricError correctly?
Shall I know all the theory and formula?

And is there any way to translate and combine all levels of OBJ models into one tileset.json?

[PrincessGod]

@CrashedBboy

I just get a transform matrix by a Cesium giving function, if you want know more detail about the matrix, may be you can search TRS Matrix.

[Amber-372]

Hi @PrincessGod. cesium's demo tileset options is like this("Longitude": { "minimum": 2.0818461850713565, "maximum": 2.0819858114115157 }, "Latitude": { "minimum": 0.4551993222126411, "maximum": 0.4553389485528006 }) ,but customTilesetOptions.json longitude and latitude is only support number. so how to use customTilesetOptions.json when I have bounding info of min/max latlng.